MIDI controller for Roger Waters World Tour

Custom controller for Mike McKnight to use on the Roger Waters Us and Them Tour.  It has 3 buttons, power input, and a MIDI output.  Per Mikes request, when pressed each of the three buttons sends a predetermined program change command from the MIDI output.  The remote was connected to a Direct Out MADI.BRIDGE.  Mike had already programmed three routing presets in the MADI.BRIDGE and just need a dedicated remote to switch between them.  The green button selected the main playback system, the yellow button selected the backup playback system, and the red button selected a mute preset.